Beam refinement for user equipment-dedicated access information

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive, prior to transmitting a user equipment dedicated (UE-dedicated) system information block type 1 (SIB1) associated with a user equipment (UE), a random access channel (RACH) from the UE. The network node may transmit, prior to transmitting the UE-dedicated SIB1 and based at least in part on receiving the RACH, a reference signal that is based at least in part on a beam management procedure. Numerous other aspects are described.

What is claimed is: 
     
         1 . An apparatus for wireless communication at a network node, comprising:
 a memory; and   one or more processors coupled to the memory and configured to cause the apparatus to:
 receive, prior to transmitting a user equipment dedicated (UE-dedicated) system information block type 1 (SIB1) associated with a user equipment (UE), a random access channel (RACH) from the UE; and 
 transmit, prior to transmitting the UE-dedicated SIB1, prior to transmitting a UE-dedicated control resource set zero (CORESET0), and based at least in part on receiving the RACH, a reference signal that is based at least in part on a beam management procedure. 
   
     
     
         2 . The apparatus of  claim 1 ,
 wherein the one or more processors, to transmit the reference signal, are configured to cause the apparatus to:
 transmit the reference signal based at least in part on a beam used to receive the RACH. 
   
     
     
         3 . The apparatus of  claim 1 ,
 wherein the one or more processors are further configured to:
 transmit a reference signal configuration indication that specifies a transmission configuration associated with the reference signal, 
 wherein the one or more processors, to transmit the reference signal, are configured to cause the apparatus to:
 transmit the reference signal based at least in part on the transmission configuration. 
 
   
     
     
         4 . The apparatus of  claim 3 ,
 wherein the one or more processors, to transmit the reference signal configuration indication, are configured to cause the apparatus to:
 transmit the reference signal configuration indication in a synchronization system block (SSB). 
   
     
     
         5 . The apparatus of  claim 3 ,
 wherein the one or more processors, to transmit the reference signal configuration indication, are configured to cause the apparatus to:
 transmit the reference signal configuration indication in the CORESET0. 
   
     
     
         6 . The apparatus of  claim 1 ,
 wherein the one or more processors are further configured to:
 transmit a Layer 1 measurement reporting configuration associated with measuring the reference signal. 
   
     
     
         7 . The apparatus of  claim 6 ,
 wherein the one or more processors, to transmit the Layer 1 measurement reporting configuration, are configured to cause the apparatus to:
 transmit the Layer 1 measurement reporting configuration in at least one of:
 a synchronization system block (SSB), or 
 the CORESET0. 
 
   
     
     
         8 . The apparatus of  claim 1 ,
 wherein the reference signal comprises a tracking reference signal with a transmission configuration that is based at least in part on at least one of:
 a time tracking refinement by the UE, or 
 a frequency tracking refinement by the UE. 
   
     
     
         9 . The apparatus of  claim 1 ,
 wherein the one or more processors are further configured to:
 transmit a timing configuration indication that specifies a timing delay between at least one of:
 a reference signal transmission and a Layer 1 report transmission, 
 the reference signal transmission and the CORESET0, 
 the reference signal transmission and a UE-dedicated SIB1 physical downlink shared channel (PDSCH), 
 the Layer 1 report transmission and the CORESET0, 
 the Layer 1 report transmission and the UE-dedicated SIB1 PDSCH, 
 the CORESET0 and the reference signal transmission, or 
 a physical random access channel and the reference signal transmission. 
 
   
     
     
         10 . An apparatus for wireless communication at a user equipment, comprising:
 a memory; and   one or more processors, coupled to the memory, configured to:
 transmit, prior to receiving a user equipment dedicated (UE-dedicated) system information block type 1 (SIB1), a random access channel (RACH) using a beam that is based at least in part on a synchronization signal block (SSB); and 
 receive, prior to receiving the UE-dedicated SIB1, prior to receiving a UE-dedicated control resource set zero (CORESET0), and based at least in part on transmitting the RACH, a reference signal that is based at least in part on a beam management procedure. 
   
     
     
         11 . The apparatus of  claim 10 ,
 wherein the one or more processors, to receive the reference signal, are configured to cause the apparatus to:
 receive the reference signal based at least in part on a beam used to transmit the RACH. 
   
     
     
         12 . The apparatus of  claim 10 ,
 wherein the one or more processors are further configured to:
 receive a reference signal configuration indication that specifies a transmission configuration associated with the reference signal, 
 wherein the one or more processors, to receive the reference signal, are configured to cause the apparatus to:
 receive the reference signal based at least in part on the transmission configuration. 
 
   
     
     
         13 . The apparatus of  claim 12 ,
 wherein the one or more processors, to receive the reference signal configuration indication, are configured to cause the apparatus to:
 receive the reference signal configuration indication in the SSB. 
   
     
     
         14 . The apparatus of  claim 12 ,
 wherein the one or more processors, to receive the reference signal configuration indication, are configured to cause the apparatus to:
 receive the reference signal configuration indication in the CORESET0. 
   
     
     
         15 . The apparatus of  claim 10 ,
 wherein the one or more processors are further configured to:
 receive a Layer 1 measurement reporting configuration associated with measuring the reference signal. 
   
     
     
         16 . The apparatus of  claim 15 ,
 wherein the one or more processors, to receive the Layer 1 measurement reporting configuration, are configured to cause the apparatus to:
 receive the Layer 1 measurement reporting configuration in at least one of:
 the SSB, or 
 CORESET0. 
 
   
     
     
         17 . The apparatus of  claim 15 ,
 wherein the beam management procedure comprises a network node beam refinement procedure, and
 wherein the Layer 1 measurement reporting configuration is based at least in part on the network node beam refinement procedure. 
   
     
     
         18 . The apparatus of  claim 15 ,
 wherein the one or more processors are further configured to:
 generate a Layer 1 measurement report based at least in part on the Layer 1 measurement reporting configuration and the reference signal; and 
 transmit, prior to receiving the UE-dedicated SIB1, the Layer 1 measurement report. 
   
     
     
         19 . The apparatus of  claim 10 ,
 wherein the beam management procedure comprises a network node beam refinement procedure, wherein reference signal repetition associated with the reference signal is disabled, and the one or more processors are further configured to:
 select, prior to receiving the UE-dedicated SIB1, a communication beam based at least in part on the network node beam refinement procedure; 
 indicate, prior to receiving the UE-dedicated SIB1, the communication beam to a network node; and 
 receive, using the communication beam, a communication based at least in part on a UE-dedicated SIB1 physical downlink shared channel (PDSCH). 
   
     
     
         20 . The apparatus of  claim 19 ,
 wherein the one or more processors are further configured to:
 receive, using the communication beam, a second communication based at least in part on the CORESET0. 
   
     
     
         21 . A method of wireless communication performed by an apparatus of a network node, comprising:
 receiving, prior to transmitting a user equipment dedicated (UE-dedicated) system information block type 1 (SIB1) associated with a user equipment (UE), a random access channel (RACH) from the UE; and   transmitting, prior to transmitting the UE-dedicated SIB1 and based at least in part on receiving the RACH, a reference signal that is based at least in part on a beam management procedure.   
     
     
         22 . The method of  claim 21 , further comprising:
 transmitting a Layer 1 measurement reporting configuration associated with measuring the reference signal.   
     
     
         23 . The method of  claim 21 ,
 wherein the beam management procedure comprises a UE receive beam refinement procedure, and
 wherein transmitting the reference signal comprises:
 transmitting, as part of the UE receive beam refinement procedure, the reference signal based at least in part on reference signal repetition being enabled. 
 
   
     
     
         24 . The method of  claim 21 ,
 wherein transmitting the reference signal comprises:
 transmitting the reference signal based at least in part on reference signal repetition being disabled. 
   
     
     
         25 . A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
 transmitting, prior to receiving a user equipment dedicated (UE-dedicated) system information block type 1 (SIB1), a random access channel (RACH) using a beam that is based at least in part on a synchronization signal block (SSB); and   receiving, prior to receiving the UE-dedicated SIB1, prior to receiving a UE-dedicated control resource set zero (CORESET0), and based at least in part on transmitting the RACH, a reference signal that is based at least in part on a beam management procedure.   
     
     
         26 . The method of  claim 25 , further comprising:
 receiving a Layer 1 measurement reporting configuration associated with measuring the reference signal.   
     
     
         27 . The method of  claim 26 , further comprising:
 generating a Layer 1 measurement report based at least in part on the Layer 1 measurement reporting configuration and the reference signal; and   transmitting, prior to receiving the UE-dedicated SIB1, the Layer 1 measurement report.   
     
     
         28 . The method of  claim 25 ,
 wherein the beam management procedure comprises a UE receive beam refinement procedure, and
 wherein receiving the reference signal comprises:
 receiving, as part of the UE receive beam refinement procedure, the reference signal based at least in part on reference signal repetition being enabled. 
 
   
     
     
         29 . The method of  claim 25 , further comprising:
 transmitting the reference signal based at least in part on a beam used to receive the RACH.   
     
     
         30 . The method of  claim 25 , further comprising:
 transmitting a reference signal configuration indication that specifies a transmission configuration associated with the reference signal, wherein transmitting the reference signal comprises transmitting the reference signal based at least in part on the transmission configuration.